Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Vassiliki A Boussiotis, MDPHD

Individual provider Internal Medicine Physician · NPI 1861474215

Vassiliki A Boussiotis, MDPHD practises Hematology/Oncology in Boston, Massachusetts. Qualified in 1980, 46 years ago. Practices with Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc, a 1,676-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
46
Licensed in
MA
In the registry since
2005
Specialties on file
2
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Practice location Address checks out

100 Blossom St Hematology Oncology Associates Cox 2
Boston, MA 02114-2606 Not confirmed with CMS for 15 years — call before visiting
Phone: (617) 724-3200
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 220011 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 220011 (MA)

Record details

NPI number1861474215
Entity typeIndividual (Type 1)
GenderFemale
Credentials MDPHD
Sole proprietorNo
NPI enumeratedNovember 18, 2005
Last updated in NPPESJune 24, 2011

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1980 (46 years in practice)
Group practice Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc — 1676 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients75
Services billed 297 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1676 clinicians in the practice; 12 are shown here.

Other providers in Boston